Querulous means complaining in a whining tone. A querulous letter.
The complaint may be justified and the tone is what the word objects to. Querulous is used of a voice more often than of a person, which softens it slightly.
1adjectivequerulousComplaining in a whining tone.
“The querulous note in his voice made everybody stop listening.”
querulous is a quality.
Latin querulus, from queri, to complain, the root of quarrel and querulousness alike.
Latin
querulōsus
Old French
querelos
English, today
querulous
Built from
From Old French querelos, from Latin querulōsus, from Latin querulus, from queror (“to complain”).
Etymology from Wiktionary, CC BY-SA